com.github.thorbenkuck.di.lang.DataAccess Maven / Gradle / Ivy

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Easy and simple di using annotation processors

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package com.github.thorbenkuck.di.lang;

import org.jetbrains.annotations.NotNull;

import java.util.Objects;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.function.Supplier;

public class DataAccess {

	@NotNull
	private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();

	@NotNull
	public  T read(@NotNull final Supplier supplier) {
		Lock lock = readWriteLock.readLock();
		try {
			lock.lock();
			T t = supplier.get();
			return Objects.requireNonNull(t);
		} finally {
			lock.unlock();
		}
	}

	public void read(@NotNull final Runnable supplier) {
		Lock lock = readWriteLock.readLock();
		try {
			lock.lock();
			supplier.run();
		} finally {
			lock.unlock();
		}
	}

	public void write(@NotNull final Runnable runnable) {
		Lock lock = readWriteLock.writeLock();
		try {
			lock.lock();
			runnable.run();
		} finally {
			lock.unlock();
		}
	}

	public  T write(@NotNull final Supplier supplier) {
		Lock lock = readWriteLock.writeLock();
		try {
			lock.lock();
			T t = supplier.get();
			return Objects.requireNonNull(t);
		} finally {
			lock.unlock();
		}
	}
}